Calculating-machine.



PATENTED JUNE 12, 1906.

H. A. HENSLEY. CALGULATING MACHINE.

APPLICATION FILED 0GT.20. 1903.

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PATENTBD JUNE l2, 1906. H. A. HENSLEY. GALCULATING MACHINE.

APPLICATION FILED 00T.20, 1903.

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N M N H .H A mf g w NN QN ,a [En Ji l QN NN M FF l lr. LU. #wv t MHSams@ ha lllll Illl QMSN No. 823,219. PATENTED JUNE 12, 1906.

v H. A. HENSLEY. GALCULATING MACHINE.

APPLIOATION FILED 00T.20,1903.

6 SHEETS-SHBBT 3.

W/ TNE SSE S.' l N VEN TOR A TTOHNE Y S No. 823,219. PATENTED JUNE l2,1906.

H. A. HBNSLEY.

GALGULATING MACHINE.

APPLICATION FILED O0T.20,1903.

' e SHEETS-SHEET 4.

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A TTOHNE YS No. 823,219. PATENTED JUNE l2, 1906. H. A. HENSLEY.

GALGULATING MACHINE.

APPLICATION FILED 0GT.20, 1903.

6 SHEETS-SHEET 5.

EBEEEL No. 823,219. PATENTED JUNE l2, 1906.

H. A. HENSLEY.

CALGULATING MACHINE.

APPLICATION FILED ooT.2o,19os.

6 SHEETS-SHEET G.

NITED STATE S*H PATENT OFFICE.

VNo. 823,219.

Specification of Letters Patent. Y

latented J' una 12, 1906.

Application filed October 20, 1903. Serial No. 177046.

Tn all. iwmm, it Trl/(ty concern:

Be it known that I, HUBERT A. HENsLEY, a subject of the King of GreatBritain, and a resident of New Rochelle, in the county of Westchesterand State of New York, have invented new and useful Im rovements inCalculating-Machines, of whic the following is a full, clear, and exactdescri tion.

My invention relates to ca culating-machines, and appertainsparticularly to certain 'novel and useful machines which are designedfor use in calculating interest or moneys for certain periods, problemsin exchange, and other matters of a like nature common in the commercialand financial world.

ln the presence instance I have especially in contemplation theconstruction of a mechanism which will be particularly adapted for usein banking-houses and like establishments where it is necessary to dailycalculate interest, problems in exchange, &c., on large sums of money,for by the use of' my machine a large saving of time, effort, andgeneral eX- penses will be attained.

Another object of my improvement is to provide a mechanism which will becompact, durable, and easily operated, the construct-ion and correlationof the parts bein such that the interest on a predetermine sum of moneymay be readily and quickly ascertained.

With the above-recited objects and others of a similar nature in viewmyinvention consists in the construction, combination, and arrangement ofparts, as is described in this specification, delineated in thedrawings, and iorth in the annexed claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figlires.

Figure 1 is a top plan view of a niachine' ter such key has beendepressed and the' parts have returned to their normal positions. Fig. 6is a detail view of assembled keys, key-bars, and vertically-depressibleoperating-bars. Fig. 7 is a transverse vertical sectional view taken onthe line 7 7 of Fig. 3. Fig. 8 is a top plan view showing portions ofthe traveling carriage of the machine and the means employed forcontrolling the movement of the same. Fig. 9 is a detail view of themechanism employed for operating the counting-disks. Fi 10 is anotherview of the same, showing t e parts in the positions they occupy when inoperation. Fig. 11 is a vertical sectional view of one of the countingdisks or wheels. Fig. 12 is a detail view, partly in section, of thelevers used in connection with the countin -disk-operating mechanism.Fig. 13 is a etail view of the iinger-lever and connection used forreleasin the locking-dogs holding the carriage where y such carriage maybe readily shifted across the machine. Fig. 14 is a detail view of thecounting-disk shaft and the disks thereon. Fig. 15 is a detail view ofthe carryingshaft. Fig. 16 is an illustrative view of an example ininterest which may be erformed with my machine, and Fig. 17 is a etailview oi one of the key-plates used in the machine.

Referring now to the accompanying drawings, it will be noted that mymachine comprises, generally speaking, a main casing containing atraveling carria e, the latter carrying a main shaft rotate by acrankhandle outside the casing, a second shaft having mounted thereon aplurality of counting disks or wheels, means on the traveling carriagedesigned when actuated to cause a certam redetermined number to appearon the dis s at an opening formed in the casin and a series ofdepressible ke s and levers cesigned to put into operation t e means forselectin a predetermined number on the counting-d1sks.

In the drawings, the letter A designates the boXin or casing of thecalculator, which may be o? any shape or form, though I have. found arectangular casing, such as is illustrated, to be preferable, the rearend a thereof bein relatively higher or deeper than the remain er of thebod portion to accommodate the carriage g, which is provided with smallwheels or rollers b, restmg upon the stri s or tracks b-, said .carriagebein adapte to travel or be shifted laterally of lOO Y slides over themain shafts `11 and 12, jour? thereof, W

the frame. This carriage is normally drawn from the left toward theright of the cas' through the medium of a spring-tensione drum 5,mounted upon a shaft .6, sup orted partially b one side of the casing anby a small brac et 7, this drum having wound thereon a cord 8, connectedat one end with the carriage, as at 9 9,. (see Figs. 1 and 2,) the cordassing over friction guide-pulleys 10 10. he carriage in its path oftravel naled transversely in the casing, the shaft llhaving a roove 13formed longitudinally hilre a similar groove is formed at 14 in theshaft 12. Extending across the machine between the two shafts isatoothed rack-bar 15, designed to'be engaged by the dog-arms 16 16,pivoted at 17 17 to the sides of the carriage. A small clip 18 is usedto limit the movement of each do upon its pivot, and when it is desiredto shift the carriage entirely across the machine Without engaging withthe teeth of this rack said dogs are elevated so as to clear the teethby the wires 19 and 20, connected with the iinger-lever 21, whichprotrudes through the topof the casing, said lever bein pivoted to abracket 22, secured to the er-rest 23, the latter in turn being fastenedto the side of the casin A small contractingspring 24 is provi ed foreach dog to normally hold the same in engagement with the rack.

Slidably mounted u on the shaft 11 are a number of counting W eels ordisks 25, eachI disk having on the periphery thereof numerals from 1 to9, each of said disks also having a zero character marked thereon. Themanner in which the disks are mounted upon the shaft is clearly shown inFig. 11, for within thegrooved portion of the shaft are a number of spri-tensioned pawls 26, one'pawl being provi ed for leach counting disk orwheel, so that said disk is normally held against rotation on the shaftuntil actuated by the means hereinafter described. As has been beforestated, there are seven of these counting disks or wheels, as in anysums upon which it may be necessary to compute interest seven figureswill be sufiicient, for in the ordinary course of daily business the useof such number is rarely exceeded, thou h the number of disks maybe-increased, desired. In order to compute the interest on any desiredsum and to.

ring the fproper characters indicating such amount o interest into viewat the slot in the top of the casing, I have rovided certain mechanism;but it is to e understood at the outset that the present machine isdesigned for computing interest at six per cent. for any number of daysup to thirtysix at one writing of the principal sum'u on the keys, andit will of course be evi ent that by mechanical changes in the machineand the arrangement of the keys and their accessories, to be hereinafterdescribed, the machine may be made to compute any amount or rate ofinterest. In this particular machine, where calculations arereqtllilired of interest for a longer period than t 'rt -six days andnot exceed' one ear, it w' l be necessary to Write the prmcipa sum twiceupon the keys.

The present machine is one of the class commonly known as ke operated,"and I will now proceed to descri e the construction of the operatingmechanism and the manner of using the same when computing the intery estupon a certain sum.

The machine isrovided with a series of keys 27, the Shanks 28 of whichprotrude through the top of the casing, and said keys are normally heldin a certain raised position through the medium of coiled s rings 29.Upon the head portion 30 of each) key is anumber designating the valueof the digit the percenta e upon which such ke when depressed is esignedto record, and t ere are nine such numbers in each series or groups ofkeysf As will be applarent upon examination of Fig. 1, the mac 'ne isdesigned to comlpute interest for thirty-six days andthere arethirty-six groups or series of keys, one group for each day, and, asstated, there are nine keys to a. grou or nine keys for each day markedupon t e machine. The shank 28 of each key extends into the casing andcarries at its end a key-plate 31 said plate being substantiallyrectangular in shape and having cut therein a pluralit of teeth innumber correspon with t e number of counting-disks used-1n the presentinstance seven--said teeth being indicated by 32. These teeth 32 vary inle th, so that when a certain key is depressed t e plate 31 of said keywill move downward .and contact with one or more, and sometimes all, ofthe vertically-movable lever-operating bars 33 in that particularsection, said plate 31 being guided in its movement by a pair of thegrooves or notches 34, formed in the guide-rods 35 ,35, which extend lonitudinally of the 'machine and divide the series of keys into six sets.

The bar 33 is formed with a head ortion 36, extending at an angle to themain body of the said bar, having therein a plurality of longitudinalslots 37 37, through which project the pins 38 38, so that the movementof said bar 1s limited. When oneof the keys is depressed, the triangularprojecting portions 39 of all the bars contacted by the teeth of theplate 31, which is correspondingly depressed, engage with the bifurcatedhead portions 40 of the levers 41, which are pivoted at 42 in the frameof the machine, and the toe portions 43 being swung forward con-tactwith the pins 44, carried by usher-rods I45, and throw said rodsforward) into contact with one end 46 of toothed rods 47, the latterrods IOC IIO

'predetermined for each plate.

through the medium of blocks 48, sliding 1n slots 49, cut in the frameof the carriage.

The teeth in any given plate are of such relative lengths that theyexpressa number, Thus if a tooth one-eighth of an inch long expressedthe figure 1, a toothone-quarter of an inch long would express thefigure 2, and

one three-quarters of an inch long would express the figure 6, and soon. If no tooth a peared on the plate, but merely a vacancy w ere latooth mi ht have been, zero is expressed. Hence i it were desired to reresent the number 7,458,093 on such a p ate it would a pear as in Fig.17. The mechanism is so esigned that the particular number 7,458,098 mayappear on the dial; out in practice, however, it not necessary that allthe figures re resented by a plate be recorded, and the r ial in itssliding movement, as aforesaid, is so regulated as to record only thenumbers that are required.V

In their normal condition the dials are all assembled so that thezero-sign on all shows through the slot, and at the commencement of acalculation the indicator 83, Fig. 1, should be placed at the zero-markof the scale 84 of the section which contains the keys which are to beuse: All the figures on the three dials farthest to the right should bein a different color from the iigures on the rest of the dials, as thefigures on these three dials always represent decimals. On reference toFig. 1 it will be seen that when the indicator 83 of the dials stands atzero the three right-hand dials, or the decimal-figures,

. are represented opposite the three teeth of any plate in that sectionwhich are farthest on the left. Hence if in our calculation with theindicator 83 standing at zero We should depress the key which controlledthe plate shown in Fig.V 17 the numbers a pearing on the dial when themechanism ha completed its movement would be 745, all decimals. Thebalance of the numbers, not being necessary in the calculation, do notap ear. Had the operation been begun with t e indicator 83 pointing tonumber 10 in the scale 84 the figures on the dial would have been 7.458.If the indicator had pointed to 1007 on the scale, the result on thedial Would have been 74.580, Hence it appears that the result of movingthe carriage one de ree of the scale to the i ht is to multiply tenumber to'be recorde by ten or to moge the decimal-point one place tothe ri t.

gThe mechanism of the device is such that after a number has beenrecorded on the dial it moves the carriage one degree of the scale tothe right. Further, the mechanism is such that, as explained in detailbelow, when several keys are depressed in succession and theoperating-crank has 'been actuated the resultant number on the dial isthe sum of all the numbers which would have appeared individually on thedial if each o eration had been conducted as a separate ca culation.

Suppose now we depress the key controlling the plate shown in Fi 17 anumber of times in succession. dial 83 point to zero on the scale 84.After the first depression and full movement of the mechanism the ii es.745 would ap )ear in the dial but the indicator would also ave moved adegree to the ri ht. Hence at the second depression of the ey the numberto be added would not be .745, but 7.458, and at the end of the fullmovement the sum of these, or 8.203, would appear, While upon the nextmovement the result at the dial would be 82.783," the carriage alsotraveling a degree farther to the right, and so on.

In order that my invention may be clearly understood, I will select aspecific example and employ a sum in describing the construction andoperation of the machlne. Assume, for instance, that we re uire theinterest on ninety-iive thousand six undred and eightyfour dollars forseven days at six per cent. We would place the traveling dial op ositethe space on the keyboard marked 7 ays, with the indicator 83 pointingto zero on the scale 84 and all the disks showing zero in the slot. Thisspace marked 7 days has nine keys, each of which controls a particularplate whose serrations indicate predetermined numbers. In this instancethese plates would be toothed to indicate numbers according to thefollowing table: Plate N o. 1 would be serrated to indicate 0011666,plate No. 2 would be serrated to indicate 0023333, plate No. 3 would beserrated to indicate 0035000, plate No. 4 would be serrated to indicate0046666, plate No. 5 would be serrated to indicate 005833)3, plate No. 6would be serrated to indicate 0070000, plateI No. 7 would be serrated toindicate 0081666, plate No. 8 would be serrated to indicate 009333)3,plate No. 9 would be serrated to indicate "0105000, which numbersindicate the interest for seven days at six lper cent. on the digit towhich each,respectively, refers. Thus 1n the case of the digit 4 theinterest' is .004666, but it is plain that the interest on ten timesfour, or forty; is expressed in the lsame figures, or 0.046666, bysimply moving the decimalpoint one place to the right, or multiplying byten. Simllarly, the interest on four hundred is 00.46666, and so on,which makes clear the office of the traveling dial. In the specificexample given interest is calculated on a basis of three hundred andsixty days to the ear. In our example, then, wefirst press the ey marked4 in the space marked 7 days. As explained above, we require only thethree iirst iigures when the calculation is in the place of units. Hencethe number Let t e indicator of the- IIO IIS

l pushed forward a certain distance until they 47 therein.` ATheseslide-bars are in turnA contact with the bars 46, having the notchespushed forward a distance which will cover a number of the notches equalto the number which the respective engaging teeth represent. Thus as thenumber we wish 'to ap ear on the dial is 004 the first and second arswill not advance at all, but the third bar will advance until the awl50, which is attached to the sliding block) 48, drops into the fourthnotch, locking the same against backward movement. The key is thenreleased and is raised through the spring 29, and the pressurebeing,removed from the bars 33 the latter are returned to position byspringsl and the rods 44 are forced back into their normal .inoperativeposition away from the bars 46 through the medium of the longplate-sprin 52, secured on the bottom of the casing an contacting withsaid bars. The awl 50 is left in engagement with the fourt notch of thebar 46,-and the shaft 12 is then given a rotation or turn through themedium of a crank-handle 53, secured to one end of the shaft, projectingthrough the side of the casing. Keyed to this shaft 12 are the eccentriccams 54 54, one at each side of the carriage, each ofs'aid cams havingan arm 55, which arm is in turn connected with a link 56, pivoted at itslower end to the carriage, the up er end of said link being connectedwith t e sliding blocks 48 of the notched bars 46. The normalinoperative position of the eccentric cams and their connections areshown in Fig. 3.

' When the cam has made a partial revolution,

owingl to the im ulse of the shaft, as shown in Fig. 5, the bloc s areulled forward in their slots, carrying with t em the bars 46, said barshaving pins 57, which contact with the vertical levers 58, pivoted at 59to the carriage, said levers being pushed forward by the pins againstthe tension of s rings 60, connected to the lower end of the ever and atthe base of the carriage. When the lever 58 is contacted by the pin 57of the forwardly-sliding bar 46 it is thrown forward and gives animpulse to the toothed rack-bar 61, which is pivoted to the levei1 58 atthe point 62, the teeth on the bar 61 engaging with the teeth of thecounting-disks 25, this bar 61 being guided in its forward and upwardmovement by a sup.- porting-strip 63, pivoted at 64 to the carriage, thepath of movement of said supporting-strip being limited by the smallpins 65 65. When the teeth of the bars '61 engage with thecounting-disks, they cause the predetermined number to appear at anopening in the face of the casing, and in the present instance thekey-bar 4 of the seventh-day series having been depressed the charactersappearing at` said opening will be 004. The completion of the revolutionby the crank-handle 53 re stores the large cams land the sliding blocksand links to their former positions. Meantime at the end of the forwardmovement of the bar 46 the pawl 50 has come in contact with a projectmpin 85, disenga 'ng the pawl from the teet of the bar46 an the latter isforced back to its normal osition by the spring 66, (see Fi 4 and 55while the contracting-spring 60 ereinbefore described pulling upon theend of the lever 58 restores the bar 61 to its original position, andthe machine is ready for the depression of the key representing the nextdigit in the proposed prlncipal sum. Upon theupward movement of the cams54 the onel nearest the lockingdogs 16 of the carriage-holding mechanism1s brought into contact with a small depending lug 67 on thelocking-dog, and as the c'am continues its upward movement it raises orlifts the lookin -dog from engagement with the teeth of the rack 15, andthe carriage is jumped or shiftedl one space to the right by means of aspring-drum and cord. The comletion of the revolution of thecrank-handle has caused the interest on four dollars to be recorded onthe dial and has also moved the` v dial one s ace to the right. The nextste in the calcu ation is to depress the key mar ed 98. Referring to thetable of predeter- IOO mined numbers, we find that appertainiig to thefigure 8 is 0093333; but the number on which we require the interest iseighty dollars instead of eight dollars, and this is the reason why thetraveling dial must move one degree to the right after each operation.If now we depress the key marked 8, we will find that fourgures of theabove number are presented and in readiness 'to be recorded on thedial-namely, 0.093-that is, three v decimal places, as before, andthenumber to the left of the decimal-point. On completing the revolution ofthe crank-handle 53 the dialwillshow.004+ 0.093,or0.097,while the dialwill have again moved a degree to the right ready to record the intereston the next digit 6. This, owing to the fact of the dial having movedtwo places to the right, now becomes $600, and the interest, 00.70'07 isadded to the previous result. Here it will be noticed have again beenadded the threeplaces of decimals; but this time there are two numbersVVon the left of the decimal-point. In fact, after each operation therewill appear an additional figure on the left of the decimalpoint. Thedial now should show a total of Y 00.797. Similarly, the interest on vethousand dollars (005.8333)and on ninety thousanddollars (0105.000) areadded, and the final result shown on the dial will be i 0111.630, asshown in Fig. 16, and is as folows:

Interest on $4 .004.6666 Interest on 80 0.093.333 Interest on 60000.700.00 Interest on 5,000 005.8333 Interest on 90,000 0.105.000

Total 80.111.630

jthe numbers on the right of the vertical line being the superfluousnumbers, which are not recorded. y

l In the course of the repeated additions above mentionedit mustnecessarily occur 4that one or more of the disks is made to turn morethan a complete revolution, which necessitates the providing in themechanism of this machine for the carrying of the figure which is droped as such a wheel commences This ii re of course follows:

lSecured to the same shaft as that carrying the eccentric cams 54 asmall gear-wheel 68 (see Eig'u 3) is designed to turn with said shaftand transmit motion through the intermeshing gear-Wheels 69 and 70 tothe gearwheel 71, which is of the same size and contains the same numberof teeth as the gear- 'wheel 68, this gear-wheel 71 being mounted upon ashaft 72 at the upper end of the machine, said shaft being adapted to beturned throuCgh the medium of thetrain of gearing just escribed. Carriedby lsaid shaft 72 and spaced apart thereon are a number of projectingstuds 73, in the present instance six studs, or one for eachcounting-disk except that on the left, which of course does not requireone, as there is no disk for it to carry to. Corresponding with each ofthese studs 73 is a pivot-bar 75, (see Fig. 9,) against the heel 74 ofwhich the corresponding stud 73 is designed to contact at a certainperiod in the revolution ofthe shaft 72. At the outer end of each bar 75is pivoted an angular lockingpawl 76, having a tooth 77 in osition whereit can be made to engage one of) the countingdisks 25. This locking-pawlis not Wholly in the same plane; but itsshape is such that the angulararm 82 is presented at the disk next on the right of the disk to whichthe tooth is presented, as will appear on reference to Figs. 9 and 10.Carried by each of the counting-disks is a small projection81, which isplaced on a division of each disk presenting the same ligure and whichis so arranged that when a disk has made a complete revolution and itbecomes necessary to carry a figure over the next disk the projection 81comes in contact with the angular arm 82 of the pawl 76, and as the diskcontinues to Iturn lit presses the arm of the pawl backward, so

that the tooth 77 is in a position to en age with the countin -diskpresented to it. hus if the arm of t e pawl were pressed back by theprojection 81 on the counting-disk farthest on the right the tooth 77 ofthe pawl would engage the countin -disk next to the one on the right.The paw is kept in its normal position, which is with both the anlar arm82 and tooth 77 clearing the countlng-disk by a pressure-spring 78,secured to the bar 75, and also by a flat spring 79 engaging with ashoulder of the pawl. When the 1projection 81 resses the arm of the pawlbac ward, this at spring 79 catches in a notch or shoulder 80 of thepawl and keeps the awl fast in a position ready to engage the isk towhich it is presented. Upon the rotation ofthe shaft 72 one of the pins73, carried thereby, contactin with the heel 74 of the bar 75 forcessaid ar u Ward on its ivot and causes the tooth 77 o the angularocking-pawl 76 to positively en age with one of the teeth of thecounting-disIr, moving said disk forward one space. All of the pins 73will contact in turn the respective bars and whenever the projection 81has caused the pawl 76 to be in position for engaging a disk said diskwill be moved around one space-that is, a carry-figure 1 will have beenadded. As the bar 75 is forced upward by the contact of the pin 73against its heel 74 the fiat spring 79, which keeps the tooth 77 of thepawl 76 in position of engagement at the end of the movement, comes incontact with a projection 86, which releases the tooth 77 and allows thepawl 76 to return to its normal position.

After the final result has been obtained in any calculation the disksmust be assembled,

lso that they all stand at zero in the slot.

For this purpose the milled head-Wheel 87 at the left end of the shaft11 in Fig; 1 is used to turn said shaft in such direction as to causethe spring-tensioned pawl 26 in each of the counting-disks 25 to en ageand hold all the wheels, so that the num ers presented by all the disksshall be the same. By continuing to turn, so that the figure presentedat the slot will be the character zero, the disks will be in positionfor the next operation. It will be obvious that if one of the figures ofthe principal sum be zero no key need be depressed, but one revolutionof the handle must be given to bring the next number to its properposition.

As herein stated, I do not confine myself to a machine for calculatinginterest; but such machine may also be employed for calculating exchane-that is to say, by making the necessary c ange in the keys and platesand marking each series of keys with characters indicating the rate ofexchange-for instance, for francs or marks-the value of a certain sum offrancs or marks may be ascertained in dol- IOO IIC

lars and cents, and vice versa. In other Words, given two pro ositionsbetween which there 1s a ratio Whic can be expressed decimally they canbe expressed in terms either of the other by means of this device.Thusthemachine may readily be arranged so as to reduce interest from sixper cent. to any other rate desired and predetermined. It is also desined that that portion of the machine W 'ch comprises the keys and thepredeter-V y any desired rate, and yet another might iigure francs andthe like.

While I have shown and herein described one particular embodiment of minvention,

it is of course to be understood t at I do not limit myself to theprecise details of construction shown herein, as there may bemodifications and variations in certain respects Without departing fromthe essential features of the invention or sacriiicing any ofthe advantaes thereof.

aving thus described my invention, I claim as new and desire to secureby Letters Patent-- Y 1. In a calculating-machine, the combinationwithcounting mechanism, of digit-indicating devices, each denoting acertain number to be multi lied, and mechanism controlled thereby,including an element denoting a predetermined multiplier, formultiplying the selected number by said predetermined multi lier.

.2. In a calculating-machine, the combination with counting mechanism,of a plurality of groups of digit-indicating devices, each denotingacertain number to be multiplied, each grou being provided withmechanism for multip ying a selected number by apredetermined multilier, the multi liers of the several grou s diiibring from eac other.

3. In a ca culating-machine, the combination with a plurality of groupsof digit-indicating devices, each denoting a certam number to bemultiplied, of counting mechanism, and a traveling carria e on which.the mechanism is mounted, w ereby such counting mechanism may be brou htinto position to be operated by any ofsai groups.

4. A calculating-machine comprising a casing, a carria e movable thereina plurality of countingisks, a lurality of depressible keys, and means,inc uding a serrated plate carried by each key, interposed between thekeys and the counting-disks and operated by the depression of the keysfor causing a predetermined number to be indicated by thecounting-disks.

5. A calculating-machine comprising a casing, a movable carriage,counting mechanism, a key, and calculating means including meansrepresenting time and other means representing rate per cent. interposedbetween the key and the counting mechanism adapted upon the operationofthe key, to calculate a desired proportion of a determined amount,such proportion being indicated by the counting mechanism.

6. A calculating-machine com rising a casing, a carriage therefor, meansor imparting movement to the carriage, a shaft extending through thecarriage, counting-disks on the shaft, and means for calculating adesired proportion of a predetermined amount and causing said proportionto be exhibited by the counting-disks, said last-mentioned meansincluding means representing a definite -period of time.

7. A calculating-machine comprising a casing, a carriage movabletherein, a plurality of counting-disks, grou s or series of depressiblekeys, a serrated p ate .carried by each key, and means for causing apredetermined number to be indicated by the counting-disks, such meansincluding mechanism adapted to be placed in operation by contact'ofcertain of the serrations of one of the plates with such mechanism, andmeans for rotating the disks.

8. A'calculating-machine comprising a cas-` ing, a carriage movabletherein, a shaft extending through said casing, counting ydevices withinthe casing, and meansl for operatingsaid devices to cause a certainnumber' to be indicated thereby., saidmeans includ.- ing a movable ke anelement having serrations of different ength carried by the key, a barin the casing adapted to be actuated by the movement of the key,meansinterposed between the bar and the counting devices designed to beactuated by the movement of the bar for selecting the number to beshown, and means for causing the counting devices to be rotated to causethe predetermined selected number to appear at the opening in the casi9. A ca culating-machine comprising a casing, a carriage movabletherein, countmgdevices withinthe casing, and means for operating saiddevices to cause a certain number to be indicated, such means includin aderessible ke'y, a serrated plate carried y said ey, a bar Within thecasing designed to be moved by contact with a serratlon of the plate, apivoted leverarranged to be moved y said bar, a pusher-rod actuated bysaid lever, means actuated by the movement of the rod for selecting thenumber to be indicated, and means for actuating the counting devices tocause said selected number to appear at an opening Within the casing.

IOC

10. A calculating-machine comprising a casing, a carriage movabletherein, counting devices within said casing, and means for operatinsaid devices to cause a certain number toe indicated, such meanscomprisin a depressible key, aserrated plate carriedy said key, a barwithin the casing designed to be moved by contact with a serration ofthe late, a pivoted lever adapted to be moved y said ar, a pusher-rodactuated by said lever, a sliding toothed bar mounted on the carriageand adapted to he moved by the pusher-rod, means for engtaging withcertain of the teeth of the sliding ar for holding the latter againstmovement,and means for rotating the counting devices to cause a certainnumber to appear at an opening Within the casing.

11. A calculating-machine comprising a casing, a carriage movabletherein, a shaft journaledv in said casing, counting devices carried bysaid shafta second shaft journaled in said casing, and means for causina predetermined number to be indicated y the counting devices, saidmeans including a ke -actuated element having rojections of di erentlength for selecting t e number to be indicated, and mechanism betweenthe second-mentioned shaft and the counting devices and put intooperationby the rotation of said second shaft, whereb such predeterminednumber will be causer? to appear at an openin in the casing.

12. movable carriage therefor, of a sha journaled in said casing,counting-disks .carried by said shaft and designed to be moved alongsaid shaft `with the travel of the carriage, key-actuated means forselectin a certain number on one of said countingisks, a second shaftjournaled in the casing, means for rotatin the second shaft, mechanisminterposed etween the second shaft and the counting-disks for causincertain of said disks to be rotated 'to exhi it a number previouslydetermined upon, and means for moving certain other of said disks to addto the number selected.

13. The combination with a easin and a movable carriage therefor, of asha t journaled in said easin counting-disks carried by said shaft andaapted to be moved along the shaft with the travel of the carriage,keyactuated means for selecting a certain number on one of thecounting-disks, a second shaft, an eccentric mounted on the secondshaft, and mechanism interposed between the eccentric and thecounting-disks and operated by the movement of the eccentric and itsshaft to engage with the counting-disks andV cause the predeterminednumber to apear. f i p 14. The combination with a casing, a movablecarriage and counting-disks, of means for causing a certain number to beexhibited he combination with a` easin and ak by said disks, such meansincluding mechanism for selecting said number, and means for rotatingthe counting-disks to cause said number toappear at an opening in thecasing, said latter means comprising a rotatable shaft journaled in thecasing, an eccentric mounted on the shaft, and a toothed sliding baroperated by the movement of the eccentric and adapted to engage with acertain one of said counting-disks, the construction being such thatsaid disk will be turned by the toothed bar to cause the number toappear at an o ening in the casing.

15. he combination of a casing, a earriage movable therein,counting-disks, keyactuated means for selectin a certain number on oneof the counting isks, mechanism for rotating the counting-disk to causesaid number to appear at anopening in the casing, such mec anismincludin a pivoted lever, a depressible bar contacting therewith, and asliding bar movable by contact with the lever, and means for actuatingcertain other of said counting-disks to add to the said number, suchmeans includin a tripping and holding'device'pivoted to t e carria e andadapted to en age with acounting-dis and means for reeasing andoperating the triplpin and holding device to cause certain of t e isksto rotate.

16. The combination of a easin a carriage movable therein, counting-diss within the casing, means for selectingpa number on one of saidcounting-disks, such means comprising an element having a determinedvalue in connection with the number selected, means for causin suchnumber to apear at any opening in t e casing, and means or adding anumber to the selected number, such means including a tri ping andholding device pivoted to the carriage, a shaft journaled in thecarriage adjacent to the tripping and holding devices, means vcarried bthe shaft adapted to engage with the device to throw the same intoengagement with the counting-disks and cause said device to move thedisks toexhibit the number, and a stop- Rin adapted to contact with thetrilpping and olding device for releasing the atter and permitting it toreturn to its normal position.

17. A calculating-machine comprising a casing, 'a carriage movabletherein, means for imparting a step-by-step movement to the carriage andlocking the latter after each step, counting devices within the casingand movable with the carriage, means for selecting a certain number onsaid counting devices, means for causing the movement of said devices toexpose a certain number, said means including a shaft journaled in theframe, means actuated by the rotation of the shaft for moving thedevices, and means for adding a number tothe number first exhibited bythe devices, such adding means including a tripping device, means foractuating IOO IIO

said trip ing deviceto cause the latter to enage witli the countingdevices and move the ast-mentioned devices to expose a new number,gearing between the rotatable shaft and the trip-actuating means foroperating the latter, and means for returning the tripping device to itsnormal position.

18. A calculatmg-machine comprising acasmg, a movable carriage,countmg-disks, mechanism expressive o? a percentage or pro ortion of adetermined amount adapted to e placed in o erative connection wlth saiddisks, means ihr actuating the disks to cause such proportion orpercentage to beexhibited, and means for causing additions of othernumbers or expressions to be'made to the proportion or percentageexpresslon iirst shown on the disks, said latter means comprising adevice adapted to engage with certain oi" the disks, and means foractuating the device to cause the rotation of the disk engaged. y

19. The combination of a casing, a movable carriage therefor, aplurality of movable countmg-disks, means for actuating certain of saiddisks to cause a desired number to be exhibited by the disks, andmechanism, adapted on a subsequent operation of the machine, to causeadditions to be made to the number first exhibited by the disks, suchmechanism including a horizontally-disposed shaft provided with laplurality of projecting pins, a tripping device, comprising a pivote arand an angular, toothed pawl pivoted to the bar and arranged between the'pin-carrying shaft and the disks and adapted to be moved by the shaftinto engagement With the disks for turning the latter, and means forreturning the tripping device to its normal position.

20. The combination of a casing, a carriage movable therein,counting-disks within `the casing,- means for selecting a certain num- 4ber upon the counting-disks, means for causing said number to a pear atan opening within the casing, an means for adding a number to thefirst-mentioned selected number, said means including a tripping devicemounted on the movable carriage, said trip- .ping device having apivoted, spring-pressed pawl at one end, and means for actuating thetripping device to move the awl into engagey ment with certain of thedis s, said means 1ncluding a revoluble shaft mounted on the carriage,and pins carried by said shaft designed to engage with and actuate thetripping dev1ce.

21. In a calculating-machine the combination of a countingdev'ice, andmeans, including a plate having a constant or ixed mathematical valuerepresenting the amount of interest on a predetermined amount ofprincipal for a specified time, adapted to coperate with said countingdevice.

22. In a calculating-machine, the combination of counting mechanism, andmeans cooperating with said counting mechanism to cause a desired amountof interest to be indicated by the latter, said means includingmechanism capable of expressing an amount of interest, 011 a determinedprincipal, at a desired rate, for a speciiied time.

23. In a calculating-machine, the combination of a counting device, andmeans including an element provided with members adapted to actuate thecounting device to cause the latter to express a predetermined amount,each of said members of the element having a constant mathematicalvalue.

24. In a calculating-machine, the combination of a counting device, andmechanism, in-

cluding a serrated plate adapted to actuate the counting device to causethe latter to express a predetermined amount, each serra- Vtion of theplate having a constant mathematical value.

25. The combination of counting mechanism, and means for calculating theinterest on a determined amount of principal, for a period of time,adapted to coperate with said counting mechanism, said means includingmeans representing the time, and other means representing the rate percent'.

26. The combination of movable digitcarriers, and mechanism forcomputing or calculatin the required interest on any amount o principal,fora desired period of time, coperating with and affecting thedigitcarriers to cause such amount of interest to be indicated by saidcarriers, such mechanism including means representing the rate per cent.

' 27. The combination. of movable digitcarriers, a key, and interestcalculating mechanism interposed between the key and the digit-carriersand ada ted, when operated, to calculate a desire amount of interestupon a predetermined amount fora period of`time, and cause such interestto be indicated by the carriers, such interest-calculating mechanismincluding means representing time and other means representing ratepercent.

28. The combination of movable digitcarriers, a depressible key carryingan element having a determined value in connection with a predeterminedamount, and mechanism interposed between the element and thedigit-carriers ada ted to coperate With said element to calcu ate adesired proportion of a predetermined amount, and to cause suchproportion to be indicated by the carriers.

29. The combination of a counting device, and means including a platehaving projections of relatively different length adapted to calculate adesired amount of interest on a determined amount and cause suchinterest IOO IIO

to be indicated by the counting device, each member of the elementhaving a constant value.

30. The combination of a rotatable counting device, a key, andinterest-calculating means interposed between the key and the countingdevice adapted when the key is actuated to automatically compute adesired amount of interest for any desired period of time on adetermined amount and cause such interest to be indicated by thecounting device, such means including means representing the time andother means representing the rate per cent.

31. The combination of acounting device, a movable key, and mechanismincluding an element carried by said key and movable therewith forcalculating a desired amount of interest upon a predetermined amount,and causing said interest to be indicated by the counting device.

32. The combination of a counting device, a key, an element operated bysaid key,'such element having a constant or fixed mathematical value asa proportion of a predetermined amount, and meansfor causing theconstant or fixed mathematical value of the element to be indicated bythe counting device when the key is actuated.

33. The combination of movable digitcarriers, a movable element having aconstant mathematical value indicative of the interest of a determinedamount, and operating mechanism for causing the value of the element tobe indicated by the carriers.

. 3a. The combination of counting devices, series or groups ofdepressible keys, a serrated plate carried by each key, each platehaving a constant mathematical value, and mechanism interposed betweenthe plates and the counting devices to cause the latter to express apredetermined number.

35. The combination of counting devices,`

a series or group of movable keys, each key having a constant value inconnection with a determined amount, and mechanism interposed betweenthe keys and counting devices to o crate the latter and cause aproportion of t e determined amount to be exhibited, such proportiondepending on the key moved.

36. The combination of counting devices, a series of movable keys, eachkey having a constant determined value in connection with a redeterminedamount, and mechanb ci, relatively different length, eachserrationhaving a constant or xed value, and means interposed between eachelement and the counting devices, designed to actuate the latter andcause the counting devices to express an amount dependent upon thevaluation of the serrations of the element carried by the key moved.

38. The combination of a casing, a carria e movable therein countingdevices movab e with the carria e, a depressible key, an elementcontrolle by sald Ykey and having a constant or ixed value expressive ofa proportion of a determined amount, and mechanism interposed between`the element and the counting devices for causing the constant or fixedvalue ofthe element to be indicated by said counting devices.

39. The combination of a casing, a carria e movable therein, a pluralityof rotatab e counting-disks movablev with the carriage, means forimparting a step-by-step movement to the carriage, a series ofdepressible keys, an element carried by each key, which element has aconstant or fixed value as a proportion of a determined amount, aconnectionbetween the elements and the counting-disks, and means forrotating the disks to cause the constant or iixed value of the elementsto be indicated thereby.

. 40. in a calculating-machine the combination of a counting device,mechanism for calculating a desired amount of interest of a pre-.determmed amount and causing such amount of interest to be indicated bythe counting device, and means for transferring or adding the interestexpression to a second interest expression obtained upon a subsequentoperation of the machine.

41. in a calculating-machine the combination of a plurality ofdigit-carriers, means including key-actuated mechanism for calculating adesired amount of interest upon a determined amount of principal andcausing such amount of interest to be expressed by the digit-carriers,and means for adding or transferring said interest expression to asecond interest expression obtained upon a subsequent operation of themachine.

42. The combination of a counting device, and actuating devices for saidcounting device, indications for said actuating devices representingamounts or principals, and means between the actuating devices and thecounting device which when operated by the actuating devices for anyprincipal, cause the amount of interest on said principal at adetermined rate for a speciiied time to be indicated by the countingdevice.

43. The combination of a counting device, a group of keys, indicationsfor said keys, representing amounts or principals, and means between thekeys and the counting device adapted to be placed in operation by saidkeys to cooperate with the counting de- IOC IIC

vice to cause the amount of interest on the principal at a determinedrate for a specified time to be indicated by the counting devlce.

44. The combination of a countin device, means for calculating theamount o interest on a selected amount or principal, at a determinedrate for a specified time, such means including means representing thetime and means representing the rate per cent. and means for placing thecalculating means in cooperation With the counting device to cause thelatter to indicate the amount of indetermined rate for a specified timeto be exhibited by the counting devices.

46. The. combination of a counting device,

esame a depressible key, means including an element carried by said keyfor calculating the amount of interest on a selected principal, at adetermined `rate for a speciied time, and operating the counting devicesto cause such amount of interest to be indicated by the latter, andmeans for adding or transferring the iirst-mentioned amount of interest`expression by the counting device, to a second interest expressionobtained on [aY subsequent operation of the machine.

47 In an interest-calculating machine, the combination of a countingdevice, means representing amounts or principals, means representingrate per cent., and other means representing a specified period of time.

In testimony whereof I have signed my name to this specification in thepresence of tWo subscribing Witnesses.

HUBERTv A. HENSLEY.

Witnesses R. B. CAVANAGH, E. G. NmLsoN.

